We're happy to announce a competition for short popular maths articles open to Plus readers of all ages and backgrounds. The winning article will be published in a forthcoming book provisionally named fifty, which will be published by Oxford University Press to coincide with the 50th anniversary of the Institute of Mathematics and its Applications in 2014.

This year we were lucky enough to see the Imaginary exhibition in Barcelona. It's an interactive mathematics exhibition that inspires the imagination with beautiful images. And what is more exciting it allows anyone to step into the world of maths!

We love the Math/Maths podcast! It's a conversation about mathematics between the UK and USA from Pulse-Project.org. Peter Rowlett in Nottingham calls Samuel Hansen in Las Vegas to chat about the math and maths that has been in the news, that they've noticed and that has happened to them.

Plus is edited entirely by women who are happily disregarding gender stereotypes, so we're always happy to highlight women's achievements in maths. We've got lots of content by or about women mathematicians on Plus and here are some of our favourites.

Mathematics and silliness is the speciality of James Grime, mathematician, juggler and comedy nerd (though not necessarily in that order). From zombie maths to post-it note dodecahedra: it's all on his YouTube channel